These co-supplements are required to get Iodine into our cells and the toxins out. The selenium is required to prevent thyroid problems. http://www.freegrab.net/Iodine%20update.htm#section18
There is also a very good chance they are super toxic with bromide, fluoride & chlorine.
See the LOW DOSE option here which involves painting Iodine to the heels for people that are super toxic / super sensitive: